giblet

The M156 in the C63 was downtuned, I believe there was a throttle opening limiter and a simple remap can net you a pretty sizeable gain. I looked into the C63 and the E9X M3 as alternatives for the ISF and a lot of C63 owners went for a simple remap from the likes of Eurocharged.

MileHIFcar

^^^^^^That makes sense, didn't know they de-tuned the M156 in the C63.

I wonder if Lexus engineers de-tuned the 2UR-GSE? Or did they yank everything they thought they could out of the motor with complying with strict emission regulations??

ISFPOWER

iTrader: (20)

IMG, they did a bit just to get some reliability of out of the motor.

Fsport2UR

The 2UR-GSE was tuned by Yamaha, not Toyota/Lexus.

MileHIFcar

I knew Yamaha developed the heads for the motor just didn't know how much tuning they had control of?? Did Lexus just turn over development of the motor more or less to Yamaha and then Lexus set some parameters for them to stick too?

SoulFreak

iTrader: (1)

Something along those lines...I know Lexus had Yamaha detune the engine to further inhibit reliability and tune the sound. Which obviously they nailed greatly.

FFM

C63 is detuned as in its the same motor from the 507 edition. MB just limits the throttle to 80%. OE like everyone else just goes in and fixes the glitch haha. So they don't really compare. That's an intentional detune to sell a higher model with the same engine.

Your average NA tune completely stock will net minimal gains. The key is to tune for mods. But in the case of the ISF the stock ECU adapts pretty well so the gains will likely still be minimal.

Fsport2UR

"Detuned" has a double meaning these days. One manufactures detune is not the same across the board for all other manufactures. And 'detuned' doesn't necessarily mean all parts are 100% there and adjustments were made through software by the manufacture to drop power. Some manufactures, as a selling point, will say so-and-so car has the same engine as their sports car exotic counterpart, but in truth, all thats the same is the block. Detuned can also mean weaker rods, pistons, valve train, smaller injectors, smaller turbo, etc..

Flogrown

iTrader: (1)

^^^very well put^^^^

bentobob

I hope this will eventually lead to end user programability.

nickj718

iTrader: (1)

Took one for the team tonight and took out my F that has never seen salt just to do some data logging for Rafi.

If anyone needs me Ill be cleaning the IL winter grime for the next hour.....

On a side note if anyone is in the Chicago area and wants the DRL feature turned off PM me and Ill do it for you

bentobob

Took my ISF up to Chicago for an event from Chattanooga TN earlier last year, I was terrified by the condition of the roads and the condition of almost every car's front and rear bumpers. I feel lucky that I got through that weekend without a scratch lol.

ISFPOWER

iTrader: (20)

its so bad, i have not driven the F here in awhile. i refuse to, these are some of the worst roads ive ever seen. im about to relocate hopefully outside of IL.

nickj718

iTrader: (1)

Lucky for me I live in the burbs so I rarely have to go downtown. The roads such though so I barely drive my car

Have a sportcross for a DD though

nickj718

iTrader: (1)

You can appreciate the sacrifice I just made them